Details: Haylou Watch  2 Pro Full Specifications: Product Name: Smart Watch 2 Pro Dimension: 48.82*37.70*10.83mm Weight: 51.4g Display: 1.85” inch IPS LCD Resolution: 240 x284 Sensors: g-sensor, heart rate monitor, blood oxygen monitor Connectivity: Bluetooth V5.3 Battery capacity : 250mAh Battery life: 10 days (24-hour heart rate monitoring) Dustproof and waterproof rating: IP68 Application: Haylou Fun Device requirements:  Android 6.0 / IOS 9.0